US PATENT SUBCLASS 148 / 317
.~.~ Nitrided

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

400  DF  STOCK {20}
316  DF  .~ Carburized or nitrided {2}
317.~.~ Nitrided {1}
318  DF  .~.~.~> Ferrous (i.e., iron base)

DEFINITION

Classification: 148/317

Nitrided:

(under subclass 316) Stock material wherein the surface of the material contains additional nitrogen diffused therein.

(1) Note. This and the indented subclass contain patents to so called "carbonitrided" material wherein both carbon and nitrogen have been diffused into the surface.